Bibliographic Details
| Title: |
Advanced TALSPEAK Separations Using a Malonate Buffer System. |
| Authors: |
Lapka, Joseph L.1, Nash, Kenneth L.1 |
| Source: |
Solvent Extraction & Ion Exchange. 2015, Vol. 33 Issue 4, p346-361. 16p. |
| Subjects: |
Malonates, Phosphorus, Separation (Technology), Americium, Rare earth metals, Extraction (Chemistry) |
| Abstract: |
The extraction behavior of lanthanides and americium has been evaluated underAdvanced TALSPEAK(Trivalent Actinide Lanthanide Separation by Phosphorus-reagent Extraction from Aqueous Komplexes) conditions using malonic acid as the aqueous buffering agent. The extractant 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP]) was used as an organic phase liquid cation exchanger inn-dodecane diluent, whileN-(hydroxyethyl)-ethylenediaminetriacetic acid (HEDTA) served as a selective aqueous holdback reagent. Extractions conducted from malonate media exhibit a pH profile that flattens as the concentration of malonate is increased up to 1.0 M malonate. This relatively flat extraction behavior from pH 2.5–4.0 is reminiscent of previous studies onAdvanced TALSPEAKin lactate media. The extraction kinetics with other carboxylic acid buffers as well as the effects of varying HEDTA, HEH[EHP], and malonate concentration are compared. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
